This power control from a 1968 Motorola manual shows how to use a contemporary diac as a zero-crossing detector. The SCR is of the type depending on the power of the load.
This circuit that uses potentiometer tuning, was found in a documentation from the 80's. The...
Another electronic ignition circuit for cars with positive ground. This circuit is from a Radio...
The MC4741 integrated circuit consists of four operational amplifiers similar to the 741 in a...